Ultra sound at 6 weeks, experiences ?

Hey guys

I’m after having a miscarriage at 8 and a half weeks, an etopic pregnancy and a blighted ovum at 6-7 weeks. Currently pregnant for the 4th time at 6 Weeks. My Dr called me to go in for a ultrasound today. I was very nervous As I know it’s super early. My boyfriend seen the screen and said he didn’t see anything but a “empty circle” (which I’m assuming was the sac). I didn’t see the screen and immediately went into panic mode. The tec didn’t say anything about the ultrasound. I went back to the EPAC clinic to get my results a while after, and the dr said to come back in two - three weeks. I had repeat beta done but unsure of the results from today’s bloodwork . I had a baseline and one follow up beta about 1-2 weeks ago. Trying to stay positive and hoping I will see something when I go back in 2-3 weeks for another ultrasound. My biggest fear is another blighted ovum